Constant-flux and wide-voltage regulating range intermediate transformer for testing

Abstract

The invention discloses a constant-flux and wide-voltage regulating range intermediate transformer for testing. The constant-flux and wide-voltage regulating range intermediate transformer comprises three phases of inner coils (2) and three phases of outer coils (1), wherein the three phases of inner coils (2) are in a triangular connection structure; the tail ends of the three phases of outer coils (1) are connected to form a star connection structure of the three phases of outer coils (1); each outer coil comprises a winding (1-1), a winding (1-2), a winding (1-3), a winding (1-4) and a winding (1-5); each winding (1-1) and each winding (1-2) are independent windings; each winding (1-3), each winding (1-4) and each winding (1-5) are three non-independent windings which are the same in structure and are axially arranged; an independent winding is formed through different series or parallel modes; each winding (1-1), each winding (1-2), each winding (1-3), each winding (1-4) and each winding (1-5) form an output winding; different combinations are transformed through a voltage regulating switch; different voltages and currents are output; the output capacity is kept invariable; the voltage regulating range is large; and the requirements of electrical tests under different test conditions can be met.

Description

technical field [0001] The invention belongs to the technical field of transformers, and relates to an intermediate transformer for testing, in particular to an intermediate transformer for testing with constant magnetic flux and wide voltage regulation range. Background technique [0002] The voltage and current of the test power supply required for electrical tests of various power transmission and transformation equipment, including transformers, reactors, transformers, etc., are different, and some of them have a relatively large range of variation. Only relying on generator sets or voltage regulators cannot meet the test requirements. . The voltage regulation range of the current test intermediate transformer is small, usually only ±5%, and the voltage regulation range is small, which causes the problem that it cannot meet the test requirements. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the above-mentio...

AI Technical Summary

Problems solved by technology

[0002] The voltage and current of the test power supply required for electrical tests of various power transmission and transformation equipment, including transformers, reactors, transformers, etc., are different, and some of them have a relatively large range of variation. Only relying on generator sets or voltage regulators cannot meet the test requirements.

The current test intermediate transformer has a small voltage regulation range, usually only ±5%, and the voltage regulation range is small, resulting in the problem that it cannot meet the test requirements.

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